A method for the production of shaft-like workpieces made of a metallic material with respect to their longitudinal axis at least one eccentric section

摘要

A rolling device for producing corrugated workpieces made of a metallic material has two flat jaws which can be synchronically moved towards each other in parallel planes, tangentially to a workpiece revolving around its longitudinal axis. The object of the invention is to provide a device for purposefully shaping non rotationally symmetrical sections in the corrugated workpieces with respect to their longitudinal axis. For that purpose, at least one rolling block (3), whose width is smaller than the total length of the workpiece (1), whose length rolling in the circumferential direction on the workpiece (1) is smaller than or equal to half the circumference of the workpiece, and whose height corresponds to a predetermined eccentricity, is provided on a flat jaw (2b). When the flat jaws are moved, the rolling block (3) displaces the material of the workpiece (1) heated up to an appropriate forging temperature of the material. The displacement of the material leads to the formation of a non rotationally symmetrical section and at the same time to a change in the length of the workpiece, or when the workpiece is laterally limited, to corrugations of the workpiece.